Create a proper package install

[jqnatividad]

as per @categulario in #7 .

This should help with adoption and building the container image

[categulario]

the only thing left is actually making the package and upload it to pypi. Probably through a github action.

[jqnatividad]

I created the package and upload it to pypi manually:
https://pypi.org/project/datapusher-plus/

Will look into automating it with a github action.

[jqnatividad]

...and we have the GH Actions in place for the next release.

https://github.com/dathere/datapusher-plus/blob/master/.github/workflows/python-publish.yml